I am attempting to rsolve a recursion and am having a problem. Doctoring up the first example the live window follows. Please note that I changed (n**2 + 3*n - 2) to (n**2 + 3*n - k) and then no output results. Is this because it won't handle parameters or am I supposed to do things differently? Ray
Python console for SymPy 0.7.6 (Python 2.7.5) These commands were executed: >>> from __future__ import division >>> from sympy import * >>> x, y, z, t = symbols('x y z t') >>> k, m, n = symbols('k m n', integer=True) >>> f, g, h = symbols('f g h', cls=Function) >>> from sympy import Function, rsolve >>> f = (n - 1)*y(n + 2) - (n**2 + 3*n - 2)*y(n + 1) + 2*n*(n + 1)*y(n) >>> rsolve(f, y(n)) 2nC0+C1n! >>> from sympy import Function, rsolve >>> from sympy.abc import n >>> from sympy.abc import n >>> y = Function('y') >>> y = Function('y') >>> f = (n - 1)*y(n + 2) - (n**2 + 3*n - 2)*y(n + 1) + 2*n*(n + 1)*y(n) >>> rsolve(f, y(n)) 2nC0+C1n! >>> f = (n - 1)*y(n + 2) - (n**2 + 3*n - k)*y(n + 1) + 2*n*(n + 1)*y(n) >>> rsolve(f, y(n)) -- You received this message because you are subscribed to the Google Groups "sympy" group. To unsubscribe from this group and stop receiving emails from it, send an email to sympy+unsubscr...@googlegroups.com. To post to this group, send email to sympy@googlegroups.com. Visit this group at http://groups.google.com/group/sympy. To view this discussion on the web visit https://groups.google.com/d/msgid/sympy/4fd75cf3-1ccc-4724-8c9e-b34def7e8b5b%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.